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Truck mechanic Guy Martin returns to try his hand at more of Britain's most challenging jobs and find out about the everyday heroes who do them. In this episode, Guy joins the crew of an RNLI lifeboat in his hometown of Grimsby as he tackles a selfless and demanding job where volunteers put their lives on the line every day.

Guy Martin goes to work one mile below the North Sea in the last deep mine in Britain, where punishing work, blistering heat, and very real dangers lurk around every corner.

Guy Martin travels to a remote island in the Hebrides to live and work on a dairy farm during calving season - after learning the ropes, he milks a herd of cows by himself.

Guy Martin joins a multi-generational family business who rescue crashed or broken-down HGVs as he learns the physics of truck recovery and operates a crane during a complex rescue.